LVM으로 물리적인 여러개의 disk를 1개처럼 사용 해봅시다.
※ 설치한 OS는 Ubuntu 14.04이며 그룹화할 disk는 sda3, sdb3 입니다.
1. fdisk로 파티션 생성
root@block1:~# fdisk /dev/sda
Command (m for help): p -- 현재 디스크 확인
Disk /dev/sda: 256.1 GB, 256060514304 bytes
255 heads, 63 sectors/track, 31130 cylinders, total 500118192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000369e6
Device Boot Start End Blocks Id System
/dev/sda1 2048 15624191 7811072 fd Linux raid autodetect
/dev/sda2 15624192 54685695 19530752 fd Linux raid autodetect
Command (m for help): n -- 디스크 파티션 추가
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Partition number (1-4, default 3): 3 - 3번째 파티션 생성
First sector (54685696-500118191, default 54685696):
Using default value 54685696
Last sector, +sectors or +size{K,M,G} (54685696-500118191, default 500118191):
Using default value 500118191
Command (m for help): t -- 파티션 시스템 아이디 변경
Partition number (1-4): 3
Hex code (type L to list codes): 8e -- LVM 아이디 8e 입력
Changed system type of partition 3 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/sda: 256.1 GB, 256060514304 bytes
255 heads, 63 sectors/track, 31130 cylinders, total 500118192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000369e6
Device Boot Start End Blocks Id System
/dev/sda1 2048 15624191 7811072 fd Linux raid autodetect
/dev/sda2 15624192 54685695 19530752 fd Linux raid autodetect
/dev/sda3 54685696 500118191 222716248 8e Linux LVM -- 생성 확인
Command (m for help): w -- 저장
The partition table has been altered!
Calling ioctl() to re-read partition table.
# 추가할 디스크 동일하게 작업한다.
2. lvm2 패키지 설치
root@block1:~# apt-get install lvm2
패키지 목록을 읽는 중입니다... 완료
의존성 트리를 만드는 중입니다
상태 정보를 읽는 중입니다... 완료
다음 패키지를 더 설치할 것입니다:
libdevmapper-event1.02.1 watershed
제안하는 패키지:
thin-provisioning-tools
다음 새 패키지를 설치할 것입니다:
libdevmapper-event1.02.1 lvm2 watershed
0개 업그레이드, 3개 새로 설치, 0개 제거 및 193개 업그레이드 안 함.
492 k바이트 아카이브를 받아야 합니다.
이 작업 후 1,427 k바이트의 디스크 공간을 더 사용하게 됩니다.
계속 하시겠습니까? [Y/n] y3. 물리적인 볼륨 생성
root@block1:~# pvcreate /dev/sda3
Device /dev/sda3 not found (or ignored by filtering).
root@block1:~# pvcreate /dev/sdb3
Device /dev/sdb3 not found (or ignored by filtering).
# 위에 같은 에러 메시지가 출력된다면 리부팅을 진행하자.
root@block1:~# pvcreate /dev/sda3 --> 물리적인 볼륨 생성
Physical volume "/dev/sda3" successfully created
root@block1:~# pvcreate /dev/sdb3 --> 물리적인 볼륨 생성
Physical volume "/dev/sdb3" successfully created
root@block1:~# pvdisplay
"/dev/sda3" is a new physical volume of "212.40 GiB"
--- NEW Physical volume ---
PV Name /dev/sda3
VG Name
PV Size 212.40 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 6lVYW0-oKQX-mVtN-FyVC-IZzk-Ncpu-KIWNV2
"/dev/sdb3" is a new physical volume of "212.40 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb3
VG Name
PV Size 212.40 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID heFKxa-pwXP-eV7f-YK1g-E4Gc-wMxe-ySA006
root@block1:~# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 lvm2 a-- 212.39g
/dev/sdb3 lvm2 a-- 212.39g
4. 물리적인 볼륨을 하나로 그룹화
root@block1:~# vgcreate jyh_test /dev/sda3 /dev/sdb3
Volume group "jyh_test" successfully created
root@block1:~# vgdisplay
--- Volume group ---
VG Name jyh_test --> 그룹 이름을 jyh_test로 생성
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size 424.79 GiB
PE Size 4.00 MiB
Total PE 108746
Alloc PE / Size 0 / 0
Free PE / Size 108746 / 424.79 GiB
VG UUID yQiSis-DaPj-hcS1-fJYC-nB46-NS7w-rGzxon5. 논리적인 볼륨 생성
root@block1:~# lvcreate -L 10GB -n data jyh_test ---> L 옵션은 사이즈, n 옵션은 볼륨 이름
Logical volume "data" created
root@block1:~# lvdisplay
--- Logical volume ---
LV Path /dev/jyh_test/data
LV Name data
VG Name jyh_test
LV UUID 8sxEHr-m6vK-Ww02-wxPM-zthy-AIIw-VGZSJs
LV Write Access read/write
LV Creation host, time block1, 2015-12-07 16:56:13 +0900
LV Status available
# open 0
LV Size 10.00 GiB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
root@block1:~# lvs
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
data jyh_test -wi-a---- 10.00g
root@block1:~# cd /dev/jyh_test/
root@block1:/dev/jyh_test# ls
data --> 생성 확인
root@block1:/dev/jyh_test#
root@block1:/dev/jyh_test# ll
total 0
drwxr-xr-x 2 root root 60 Dec 7 16:56 ./
drwxr-xr-x 16 root root 4240 Dec 7 16:56 ../
lrwxrwxrwx 1 root root 7 Dec 7 16:56 data -> ../dm-0
root@block1:/dev/jyh_test# fdisk -l
..
..
..
Disk /dev/mapper/jyh_test-data: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/jyh_test-data doesn't contain a valid partition table
root@block1:/dev/jyh_test# ll /dev/mapper/jyh_test-data
lrwxrwxrwx 1 root root 7 Dec 7 16:56 /dev/mapper/jyh_test-data -> ../dm-0
6. 생성된 볼륨 포맷, 마운트
root@block1:/dev/jyh_test# mkfs.ext4 /dev/jyh_test/data
mke2fs 1.42.9 (4-Feb-2014)
Discarding device blocks: done
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
655360 inodes, 2621440 blocks
131072 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2684354560
80 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
root@block1:~# mkdir /root/mount_dir
root@block1:~# mount /dev/jyh_test/data /root/mount_dir/
root@block1:~# df -Th
Filesystem Type Size Used Avail Use% Mounted on
..
..
..
/dev/mapper/jyh_test-data ext4 9.8G 23M 9.2G 1% /root/mount_dir# 리부팅후에도 마운트 유지할려면 fstab도 수정 해주자.